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प्रश्न
The diagram alongside represents the structure of the human ear.
(i) Write the names of the parts labelled a to g.
(ii) State briefly the functions of the parts b, d, and g.
(iii) Name the main division of the ear.
(iv) Which is the smallest bone in the human body?
(v) What is labyrinth?
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उत्तर
(i) (a) Bone of skull
(b) Inner ear
(c) Eardrum
(d) Bone of skull
(e) Bone of middle ear
(f) Middle ear
(g) Air filled
(ii) (b) Inner ear - It transmits the impulse to brain.
(d) Bone of skull - It helps in fixing the position of the ears to help the brain use auditory cues to judge direction and distance of sounds.
(g) Air filled - It keeps the pressure in the middle ear equalized with pressure in the outside.
(iii) The main division of the ear are: outer ear, middle ear and inner ear.
(iv) Stirrup
(v) The labyrinth is the inner ear which consists of utriculus, sacculus, cochlea and three semicircular canals.
संबंधित प्रश्न
- Draw a well-labelled diagram of the membranous labyrinth found in the inner ear.
- Based on the diagram drawn above in (i), give a suitable term for each of the following descriptions:
- The sensory cells that help in hearing.
- The part that is responsible for static balance of the body.
- The membrane-covered opening that connects the middle ear to the inner ear.
- The fluid present in the middle chamber of cochlea.
- The structure that maintains dynamic equilibrium of the body.
Draw a labelled diagram of the inner ear.
Name the three tiny bones present in the middle part of ear.
There are three small bones in the muddle ear – anvil, hammer and stirrup :
(a) Which of these bones is in touch with ear-drum ?
(b) Which of these bones is in touch with oval window ?
Draw a neat and labelled diagram of the human ear. With the help of this diagram, explain the construction and working of the human ear.
State the Location:
Semicircular canals
Long answer question
Draw the neat labelled diagram of the human ear.
State the functions of the following:
Auditory nerve
Where are the following located?
Eustachian canal
Name the part of the inner ear that is responsible for static balance in human beings.
